28128955198 has 8 divisors (see below), whose sum is σ = 43222541040. Its totient is φ = 13721441520.

The previous prime is 28128955187. The next prime is 28128955201. The reversal of 28128955198 is 89155982182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171517938 + ... + 171518101.

It is an arithmetic number, because the mean of its divisors is an integer number (5402817630).

Almost surely, 2^28128955198 is an apocalyptic number.

28128955198 is a deficient number, since it is larger than the sum of its proper divisors (15093585842).

28128955198 is a wasteful number, since it uses less digits than its factorization.

28128955198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343036082.

The product of its digits is 4147200, while the sum is 58.

The spelling of 28128955198 in words is "twenty-eight billion, one hundred twenty-eight million, nine hundred fifty-five thousand, one hundred ninety-eight".